3 * David L. Nugent. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/usr.sbin/pw/edgroup.c,v 1.9 2004/03/08 20:31:37 kensmith Exp $
34 #include <sys/types.h>
39 #include <sys/param.h>
45 isingroup(char const * name
, char **mem
)
49 for (i
= 0; mem
[i
] != NULL
; i
++)
50 if (strcmp(name
, mem
[i
]) == 0)
56 editgroups(char *name
, char **groups
)
60 char groupfile
[MAXPATHLEN
];
61 char grouptmp
[MAXPATHLEN
];
63 strncpy(groupfile
, getgrpath(_GROUP
), MAXPATHLEN
- 5);
64 groupfile
[MAXPATHLEN
- 5] = '\0';
65 strcpy(grouptmp
, groupfile
);
66 strcat(grouptmp
, ".new");
68 if ((infd
= open(groupfile
, O_RDWR
| O_CREAT
| O_EXLOCK
, 0644)) != -1) {
71 if ((infp
= fdopen(infd
, "r+")) == NULL
)
76 if ((outfd
= open(grouptmp
, O_RDWR
| O_CREAT
| O_TRUNC
, 0644)) != -1) {
79 if ((outfp
= fdopen(outfd
, "w+")) == NULL
)
82 int linelen
= PWBUFSZ
;
84 int memlen
= 200; /* Arbitrary */
85 char *line
= malloc(linelen
);
86 char *outl
= malloc(outlen
);
87 char **mems
= malloc(memlen
* sizeof(char *));
88 int namlen
= strlen(name
);
90 if (line
== NULL
|| outl
== NULL
|| mems
== NULL
) {
94 while (fgets(line
, linelen
, infp
) != NULL
) {
98 while ((p
= strchr(line
, '\n')) == NULL
)
100 if (extendline(&line
, &linelen
, linelen
+ PWBUFSZ
) == -1) {
104 if (fgets(line
+ l
, linelen
- l
, infp
) == NULL
)
105 break; /* No newline terminator on last line */
107 l
= strlen(line
) + namlen
+ 1;
108 if (extendline(&outl
, &outlen
, l
) == -1) {
113 else if (*line
== '\n')
119 char const *sep
= ":\n";
122 memset(&grp
, 0, sizeof grp
);
123 for (i
= 0; (p
= strsep(&cp
, sep
)) != NULL
; i
++) {
125 case 0: /* Group name */
128 case 1: /* Group password */
131 case 2: /* Group id */
132 grp
.gr_gid
= atoi(p
);
134 case 3: /* Member list */
138 default: /* Individual members */
140 if (extendarray(&mems
, &memlen
, mno
+ 2) == -1) {
148 if (i
< 2) /* Bail out - insufficient fields */
152 for (i
= mno
; i
< memlen
; i
++)
156 * Delete from group, or add to group?
158 if (groups
== NULL
|| isingroup(grp
.gr_name
, groups
) == -1) { /* Delete */
161 while ((idx
= isingroup(name
, mems
)) != -1) {
162 for (i
= idx
; i
< (memlen
- 1); i
++)
163 mems
[i
] = mems
[i
+ 1];
168 * Special case - deleting user and group may be user's own
170 if (groups
== NULL
&& mems
[0] == NULL
&& strcmp(name
, grp
.gr_name
) == 0) {
172 * First, make _sure_ we don't have other members
177 while ((pwd
= GETPWENT()) != NULL
&& (gid_t
)pwd
->pw_gid
!= (gid_t
)grp
.gr_gid
);
179 if (pwd
== NULL
) /* No members at all */
180 continue; /* Drop the group */
182 } else if (isingroup(name
, mems
) == -1) {
183 if (extendarray(&mems
, &memlen
, mno
+ 2) == -1) {
186 grp
.gr_mem
= mems
; /* May have realloced() */
190 fmtgrentry(&outl
, &outlen
, &grp
, PWF_GROUP
);
194 if (fflush(outfp
) != EOF
) {
198 * Copy data back into the original file and truncate
202 while (fgets(outl
, outlen
, outfp
) != NULL
)
206 * This is a gross hack, but we may have corrupted the
209 if (fflush(infp
) == EOF
|| ferror(infp
))
210 rc
= rename(grouptmp
, groupfile
) == 0;
212 ftruncate(infd
, ftell(infp
));